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Tempest 2400 Wireless Intercom System

orthogonal frequency relationship of the consecutive redundant packet transmission, the potential for loss

of any single audio packet (2 consecutive data packet transmissions) is dramatically reduced. In addition,

each packet transmission is sent out from different antennas. This unique approach enables Tempest to

utilize spatial diversity, frequency diversity, time diversity and polarization diversity.

Transmission redundancy and the incorporation of various diversity techniques provide an RF system that

is robust and reliable under greatly varying operational conditions. Because of this inherent design,

Tempest delivers superior operational range and greater levels of interference and multipath fade

rejection.

Covering extremely large areas or multiple coverage locations can be problematic with traditional wireless

intercom systems. Tempest utilizes iSelect™ on-command roaming to allow users to move from one area

of coverage to another. iSelect allows Tempest users to easily choose the desired coverage area by

selecting the base station they want to communicate through. The beltstation (remote) remembers the

last 64 base stations with which it has been Paired. When a different base station is selected, the hopping

pattern and key code of the beltstation is synchronized to the selected base station and the beltstation

logs into the base station.

Audio latency is a critical factor in all digital systems. The hop duration in Tempest is intentionally kept

very short - under 5ms. This short hop duration limits the amount of data that may be lost in any one hop.

More importantly, it reduces system latency, which can cause undesirable echo. Total one-way

(beltstation to base station) system latency is less than 50ms.

Even with this short system latency, unwanted and distracting echo will occur when interfacing with

hardwired party-line intercom systems unless echo-reduction technology is implemented. Echo is

primarily the result of inefficiencies in the conversion of the two-wire signal. This condition exists in analog

systems as well, but it does not cause unwanted echo because there is no system latency delay.

Tempest uses advanced echo-cancellation algorithms to eliminate this echo.

Wireless intercom systems are often used in high-noise environments that require special design

consideration for effective operation. Tempest operates extremely well even in very high ambient noise

levels. This is primarily due to specific design criteria which allow Tempest to achieve an audio dynamic

range of greater than 94dB. This is more than double that of most other digital wireless communication

systems. This design makes Tempest ideal for use at sporting venues, concerts and other events where

unwanted noise levels are high.

Tempest offers a host of features and technology to ensure that it performs well in almost all production

environments virtually anywhere in the world with no licensing requirements or fees.

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